4Inch TinySA Ultra Spectrum Analyzer 100kHz-5.3GHz,V0.4.5.1 Portable Tiny Frequency Analyzer with 32GB SD Card & 3000mAh Battery, 2-in-1 RF Signal Generator RBW LNA DANL Phase Noise

Small size, great documentation. Connects to my PC which is better than using eyeglasses. As I've just begun to use it I can't say much more. Very useful to aim satellite dishes at satellites. Depending on the application you need to know the azimuth and elevation of the satellite then use this to find and tune the signal,

I had an older 2.8 inch non-ultra version I used a lot to check for harmonics and mixing products. The upgrade to the Ultra version withthe larger screen is sonething I should have done last year! So many new features and the larger display really helps see some of the smaller signals.

Be sure to run the self test when you get one, and calibrate it, and you will get great results. I've tested a number of HTs with it already. Love the ultra more than the regular one (I have both).

Very impressive tool, I plan to use it to help manage wireless microphones at small shows and at churches. Went through the video instructions, was super-easy to set-up and understand.

The first one I got worked well, but the 3.5mm jack was soldered on to the board slightly off the mark and ended up tearing off with some of the traces under it.I was taken care of though and the vendor sent me another one at no additional cost.Great product with great support. Highly recommend. Cheers.

Handy device for in the field assessments.

This spectrum analyzer is very sensitive and has a max input of five volts. It takes a lot of exploration to figure out how it works. There is little information in the user’s manual so it is necessary to go to the internet for help. There is no one you can call for help.

I’m a ham radio operator, and I use it to check transmitting frequencies and output power. Really pleased with it so far, and it looks like it has so many more capabilities!